I guess they could, but you will have to consider the purpose for getting meta data from the visitor. Most of the time it is just used for styling purposes to enhance your experience, blocking JS completely breaks alot of websites today's because they are often rendered using Js based front-end frameworks.
Look for a JS blocking extension, try out what works for you and spend some extra time tweaking it for websites you visit often, then you don't have to rely on a specific browser.